\name{IsDatasourceExist}
\alias{IsDatasourceExist}
%- Also NEED an '\alias' for EACH other topic documented here.
\title{
Determine whether the datasource exists
}
\encoding{UTF-8}
\description{
通过指定数据源别名，判断数据源是否存在。
}
\usage{
IsDatasourceExist(value)
}
%- maybe also 'usage' for other objects documented here.
\arguments{
  \item{value}{
数据源别名
}
}
\details{
%%  ~~ If necessary, more details than the description above ~~
}
\value{
如果数据源别名已经存在，别返回TRUE，否则返回FALSE
}
\references{
%% ~put references to the literature/web site here ~
}
\author{
%%  ~~who you are~~
}
\note{
%%  ~~further notes~~
}

%% ~Make other sections like Warning with \section{Warning }{....} ~

\seealso{
%% ~~objects to See Also as \code{\link{help}}, ~~~
}
\examples{
server <- system.file("/sampledata/ChangChun.udb", package="RSuperMap")
ds <- OpenDatasource(server, alias = "test", engine = "udb")
IsDatasourceExist("test")
CloseDatasource(ds)
}
% Add one or more standard keywords, see file 'KEYWORDS' in the
% R documentation directory.
\keyword{ supermap }% use one of  RShowDoc("KEYWORDS")
\keyword{ datasource }% __ONLY ONE__ keyword per line
